I have a FX5 and they work great. We bought it for predator hunting but I bust it out once in a while to jack with the crows. It takes about 2-5 min and I have them in my yard. I have also called hawks in owls and all the predators and even dogs. Crow decoys really make them come in careless. Good luck shoot me a pm with any other questions I will be glad to help ya.